:root {
  --page: #F5F7FB;
  --surface: #FFFFFF;
  --primary: #5B5FEF;
  --primary-soft: #EEEEFF;
  --text: #1F2638;
  --muted: #667085;
  --subtle: #9299AA;
  --border: #E5E9F2;
  --success: #16A36A;
  --warning: #E39B19;
  --error: #D64555;
  --sidebar: 220px;
  --topbar: 56px;
  --radius: 10px;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text);
  background: var(--page);
}

* { box-sizing: border-box; }
html, body, #app { min-width: 320px; min-height: 100%; margin: 0; }
body { font-size: 14px; line-height: 22px; letter-spacing: 0; }
button, input, select, textarea { font: inherit; letter-spacing: 0; }
button { cursor: pointer; }
.hidden { display: none !important; }

.login-page { display: grid; min-height: 100vh; place-items: center; padding: 24px; background: var(--page); }
.login-panel { width: min(420px, 100%); padding: 32px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: 0 12px 32px rgba(31,38,56,.08); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 8px; color: #fff; background: var(--primary); font-size: 20px; font-weight: 700; }
.brand strong { display: block; font-size: 18px; line-height: 26px; }
.brand span { color: var(--muted); font-size: 12px; }
.login-panel h1 { margin: 28px 0 4px; font-size: 20px; line-height: 28px; font-weight: 600; }
.login-panel > p { margin: 0 0 20px; color: var(--muted); }

.field { display: grid; gap: 6px; margin-bottom: 14px; }
.field label { color: var(--muted); font-size: 13px; }
.input, select, textarea { width: 100%; min-height: 36px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; color: var(--text); outline: 0; background: #fff; }
.input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(91,95,239,.10); }
textarea { min-height: 112px; resize: vertical; }
.button { display: inline-flex; min-height: 36px; align-items: center; justify-content: center; padding: 6px 14px; border: 1px solid transparent; border-radius: 6px; color: #fff; background: var(--primary); font-weight: 600; }
.button.secondary { color: var(--text); border-color: var(--border); background: #fff; }
.button.danger { color: #fff; background: var(--error); }
.button.warning { color: #fff; background: var(--warning); }
.button:disabled { cursor: default; opacity: .5; }
.login-panel .button { width: 100%; margin-top: 4px; }

.shell { display: grid; min-height: 100vh; grid-template-columns: var(--sidebar) 1fr; grid-template-rows: var(--topbar) 1fr; }
.sidebar { grid-row: 1 / 3; padding: 16px 12px; border-right: 1px solid var(--border); background: var(--surface); }
.sidebar .brand { padding: 0 8px 16px; border-bottom: 1px solid var(--border); }
.sidebar .brand-mark { width: 32px; height: 32px; font-size: 16px; }
.nav { display: grid; gap: 2px; margin-top: 12px; }
.nav button { width: 100%; height: 36px; padding: 0 12px; border: 0; border-radius: 6px; color: var(--muted); background: transparent; text-align: left; }
.nav button:hover { color: var(--text); background: var(--page); }
.nav button.active { color: var(--primary); background: var(--primary-soft); font-weight: 600; }
.topbar { display: flex; grid-column: 2; align-items: center; justify-content: space-between; padding: 0 24px; border-bottom: 1px solid var(--border); background: var(--surface); }
.topbar h1 { margin: 0; font-size: 20px; line-height: 28px; font-weight: 600; }
.account { display: flex; align-items: center; gap: 12px; color: var(--muted); }
.account button { border: 0; color: var(--primary); background: transparent; }
.content { min-width: 0; padding: 24px; }

.toolbar { display: flex; min-height: 36px; align-items: center; gap: 8px; margin-bottom: 16px; }
.toolbar .input { width: min(320px, 100%); }
.toolbar .spacer { flex: 1; }
.panel { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.panel-head { display: flex; min-height: 48px; align-items: center; justify-content: space-between; padding: 0 16px; border-bottom: 1px solid var(--border); }
.panel-head h2 { margin: 0; font-size: 16px; line-height: 24px; font-weight: 600; }
.panel-body { padding: 16px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.metric { padding: 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.metric span { color: var(--muted); }
.metric strong { display: block; margin-top: 8px; font-size: 24px; line-height: 32px; font-weight: 600; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; min-width: 760px; border-collapse: collapse; }
th, td { height: 44px; padding: 0 12px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
th { color: var(--muted); background: #FAFBFD; font-size: 12px; font-weight: 600; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #FAFBFD; }
.link-button { padding: 0; border: 0; color: var(--primary); background: transparent; }
.status { display: inline-flex; min-height: 24px; align-items: center; padding: 1px 8px; border-radius: 999px; color: var(--muted); background: #F0F2F6; font-size: 12px; }
.status.success { color: var(--success); background: #EAF7F1; }
.status.warning { color: var(--warning); background: #FFF6E5; }
.status.error { color: var(--error); background: #FDEDEF; }
.empty { padding: 48px 16px; color: var(--muted); text-align: center; }
.pager { display: flex; min-height: 48px; align-items: center; justify-content: flex-end; gap: 8px; padding: 0 16px; border-top: 1px solid var(--border); }
.pager button { min-width: 32px; height: 30px; border: 1px solid var(--border); border-radius: 5px; color: var(--text); background: #fff; }

.modal-layer { position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 24px; background: rgba(31,38,56,.42); }
.modal { width: min(720px, 100%); max-height: calc(100vh - 48px); overflow: hidden; border-radius: var(--radius); background: var(--surface); box-shadow: 0 20px 56px rgba(31,38,56,.22); }
.modal > header { display: flex; height: 56px; align-items: center; padding: 0 20px; border-bottom: 1px solid var(--border); }
.modal h2 { flex: 1; margin: 0; font-size: 18px; line-height: 26px; font-weight: 600; }
.icon-button { display: grid; width: 32px; height: 32px; place-items: center; border: 0; color: var(--muted); background: transparent; font-size: 24px; }
.modal-body { max-height: calc(100vh - 176px); overflow: auto; padding: 20px; }
.modal footer { display: flex; min-height: 64px; align-items: center; justify-content: flex-end; gap: 8px; padding: 12px 20px; border-top: 1px solid var(--border); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-grid .wide { grid-column: 1 / -1; }
.check-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 12px; padding: 10px; border: 1px solid var(--border); border-radius: 6px; }
.check-option { display: flex; align-items: center; gap: 7px; color: var(--text) !important; }
.check-option input { width: 16px; height: 16px; margin: 0; accent-color: var(--primary); }
.read-only { min-height: 36px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); background: var(--page); }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.detail { padding: 12px; border: 1px solid var(--border); border-radius: 6px; }
.detail span { display: block; color: var(--muted); font-size: 12px; }
.detail strong { display: block; margin-top: 4px; overflow-wrap: anywhere; }
.subsection { margin-top: 20px; }
.subsection h3 { margin: 0 0 8px; font-size: 16px; line-height: 24px; }
.toast { position: fixed; z-index: 30; right: 24px; bottom: 24px; max-width: min(420px, calc(100% - 48px)); padding: 10px 14px; border-radius: 6px; color: #fff; background: var(--text); box-shadow: 0 8px 24px rgba(31,38,56,.2); }

@media (max-width: 1100px) {
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  :root { --sidebar: 100%; }
  .shell { display: block; }
  .sidebar { position: static; padding: 10px 12px; border-right: 0; border-bottom: 1px solid var(--border); }
  .sidebar .brand { display: none; }
  .nav { display: flex; overflow-x: auto; margin: 0; }
  .nav button { flex: 0 0 auto; width: auto; }
  .topbar { height: var(--topbar); padding: 0 16px; }
  .content { padding: 16px; }
  .metric-grid { grid-template-columns: 1fr; }
  .form-grid, .detail-grid { grid-template-columns: 1fr; }
  .form-grid .wide { grid-column: auto; }
  .toolbar { align-items: stretch; flex-wrap: wrap; }
}